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Old 10th Jun 2006, 2:44 pm   #10
Kat Manton
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Join Date: Jul 2005
Location: West Yorkshire, UK.
Posts: 1,700
Default Re: FOTH RGB combiner problems

Hi again...

...just a thought, a workaround for the sync-pulse stretching of this combiner could be to reduce the width of the sync pulse as it comes from the computer. Reduce the third number (sync pulse end) in the horizontal section of the modeline (as long as it remains a multiple of eight) to make up for the stretching...

I'm probably going to do something similar with the modeline for the proper SPG circuit; I'll probably set the front porch to zero and the sync pulse quite short, the SPG circuitry locked to this can then generate sync with the correct front porch length and sync pulse length, more accurately than can be set by modeline alone (that pesky "multiple of eight" thing gets in the way.)

Regards, Kat
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